[linux-2.6-block.git] / drivers / usb / musb / omap2430.c

/*
 * Copyright (C) 2005-2007 by Texas Instruments
 * Some code has been taken from tusb6010.c
 * Copyrights for that are attributable to:
 * Copyright (C) 2006 Nokia Corporation
 * Tony Lindgren <tony@atomide.com>
 *
 * This file is part of the Inventra Controller Driver for Linux.
 *
 * The Inventra Controller Driver for Linux is free software; you
 * can redistribute it and/or modify it under the terms of the GNU
 * General Public License version 2 as published by the Free Software
 * Foundation.
 *
 * The Inventra Controller Driver for Linux is distributed in
 * the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
 * License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with The Inventra Controller Driver for Linux ; if not,
 * write to the Free Software Foundation, Inc., 59 Temple Place,
 * Suite 330, Boston, MA  02111-1307  USA
 *
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
#include <linux/err.h>

#include "musb_core.h"
#include "omap2430.h"

struct omap2430_glue {
	struct device		*dev;
	struct platform_device	*musb;
};
#define glue_to_musb(g)		platform_get_drvdata(g->musb)

static struct timer_list musb_idle_timer;

static void musb_do_idle(unsigned long _musb)
{
	struct musb	*musb = (void *)_musb;
	unsigned long	flags;
	u8	power;
	u8	devctl;

	spin_lock_irqsave(&musb->lock, flags);

	switch (musb->xceiv->state) {
	case OTG_STATE_A_WAIT_BCON:

		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
		if (devctl & MUSB_DEVCTL_BDEVICE) {
			musb->xceiv->state = OTG_STATE_B_IDLE;
			MUSB_DEV_MODE(musb);
		} else {
			musb->xceiv->state = OTG_STATE_A_IDLE;
			MUSB_HST_MODE(musb);
		}
		break;
	case OTG_STATE_A_SUSPEND:
		/* finish RESUME signaling? */
		if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
			power = musb_readb(musb->mregs, MUSB_POWER);
			power &= ~MUSB_POWER_RESUME;
			dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
			musb_writeb(musb->mregs, MUSB_POWER, power);
			musb->is_active = 1;
			musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
						| MUSB_PORT_STAT_RESUME);
			musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
			usb_hcd_poll_rh_status(musb_to_hcd(musb));
			/* NOTE: it might really be A_WAIT_BCON ... */
			musb->xceiv->state = OTG_STATE_A_HOST;
		}
		break;
	case OTG_STATE_A_HOST:
		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
		if (devctl &  MUSB_DEVCTL_BDEVICE)
			musb->xceiv->state = OTG_STATE_B_IDLE;
		else
			musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
	default:
		break;
	}
	spin_unlock_irqrestore(&musb->lock, flags);
}


static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
{
	unsigned long		default_timeout = jiffies + msecs_to_jiffies(3);
	static unsigned long	last_timer;

	if (timeout == 0)
		timeout = default_timeout;

	/* Never idle if active, or when VBUS timeout is not set as host */
	if (musb->is_active || ((musb->a_wait_bcon == 0)
			&& (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
		dev_dbg(musb->controller, "%s active, deleting timer\n",
			otg_state_string(musb->xceiv->state));
		del_timer(&musb_idle_timer);
		last_timer = jiffies;
		return;
	}

	if (time_after(last_timer, timeout)) {
		if (!timer_pending(&musb_idle_timer))
			last_timer = timeout;
		else {
			dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
			return;
		}
	}
	last_timer = timeout;

	dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
		otg_state_string(musb->xceiv->state),
		(unsigned long)jiffies_to_msecs(timeout - jiffies));
	mod_timer(&musb_idle_timer, timeout);
}

static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
{
	u8		devctl;
	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
	int ret = 1;
	/* HDRC controls CPEN, but beware current surges during device
	 * connect.  They can trigger transient overcurrent conditions
	 * that must be ignored.
	 */

	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);

	if (is_on) {
		if (musb->xceiv->state == OTG_STATE_A_IDLE) {
			/* start the session */
			devctl |= MUSB_DEVCTL_SESSION;
			musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
			/*
			 * Wait for the musb to set as A device to enable the
			 * VBUS
			 */
			while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {

				cpu_relax();

				if (time_after(jiffies, timeout)) {
					dev_err(musb->controller,
					"configured as A device timeout");
					ret = -EINVAL;
					break;
				}
			}

			if (ret && musb->xceiv->set_vbus)
				otg_set_vbus(musb->xceiv, 1);
		} else {
			musb->is_active = 1;
			musb->xceiv->default_a = 1;
			musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
			devctl |= MUSB_DEVCTL_SESSION;
			MUSB_HST_MODE(musb);
		}
	} else {
		musb->is_active = 0;

		/* NOTE:  we're skipping A_WAIT_VFALL -> A_IDLE and
		 * jumping right to B_IDLE...
		 */

		musb->xceiv->default_a = 0;
		musb->xceiv->state = OTG_STATE_B_IDLE;
		devctl &= ~MUSB_DEVCTL_SESSION;

		MUSB_DEV_MODE(musb);
	}
	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);

	dev_dbg(musb->controller, "VBUS %s, devctl %02x "
		/* otg %3x conf %08x prcm %08x */ "\n",
		otg_state_string(musb->xceiv->state),
		musb_readb(musb->mregs, MUSB_DEVCTL));
}

static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
{
	u8	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);

	devctl |= MUSB_DEVCTL_SESSION;
	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);

	return 0;
}

static inline void omap2430_low_level_exit(struct musb *musb)
{
	u32 l;

	/* in any role */
	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
	l |= ENABLEFORCE;	/* enable MSTANDBY */
	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
}

static inline void omap2430_low_level_init(struct musb *musb)
{
	u32 l;

	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
	l &= ~ENABLEFORCE;	/* disable MSTANDBY */
	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
}

/* blocking notifier support */
static int musb_otg_notifications(struct notifier_block *nb,
		unsigned long event, void *unused)
{
	struct musb	*musb = container_of(nb, struct musb, nb);

	musb->xceiv_event = event;
	schedule_work(&musb->otg_notifier_work);

	return 0;
}

static void musb_otg_notifier_work(struct work_struct *data_notifier_work)
{
	struct musb *musb = container_of(data_notifier_work, struct musb, otg_notifier_work);
	struct device *dev = musb->controller;
	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	struct omap_musb_board_data *data = pdata->board_data;

	switch (musb->xceiv_event) {
	case USB_EVENT_ID:
		dev_dbg(musb->controller, "ID GND\n");

		if (!is_otg_enabled(musb) || musb->gadget_driver) {
			pm_runtime_get_sync(musb->controller);
			otg_init(musb->xceiv);
			omap2430_musb_set_vbus(musb, 1);
		}
		break;

	case USB_EVENT_VBUS:
		dev_dbg(musb->controller, "VBUS Connect\n");

		if (musb->gadget_driver)
			pm_runtime_get_sync(musb->controller);
		otg_init(musb->xceiv);
		break;

	case USB_EVENT_NONE:
		dev_dbg(musb->controller, "VBUS Disconnect\n");

		if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
			if (musb->gadget_driver) {
				pm_runtime_mark_last_busy(musb->controller);
				pm_runtime_put_autosuspend(musb->controller);
			}

		if (data->interface_type == MUSB_INTERFACE_UTMI) {
			if (musb->xceiv->set_vbus)
				otg_set_vbus(musb->xceiv, 0);
		}
		otg_shutdown(musb->xceiv);
		break;
	default:
		dev_dbg(musb->controller, "ID float\n");
	}
}

static int omap2430_musb_init(struct musb *musb)
{
	u32 l, status = 0;
	struct device *dev = musb->controller;
	struct musb_hdrc_platform_data *plat = dev->platform_data;
	struct omap_musb_board_data *data = plat->board_data;

	/* We require some kind of external transceiver, hooked
	 * up through ULPI.  TWL4030-family PMICs include one,
	 * which needs a driver, drivers aren't always needed.
	 */
	musb->xceiv = otg_get_transceiver();
	if (!musb->xceiv) {
		pr_err("HS USB OTG: no transceiver configured\n");
		return -ENODEV;
	}

	INIT_WORK(&musb->otg_notifier_work, musb_otg_notifier_work);

	status = pm_runtime_get_sync(dev);
	if (status < 0) {
		dev_err(dev, "pm_runtime_get_sync FAILED");
		goto err1;
	}

	l = musb_readl(musb->mregs, OTG_INTERFSEL);

	if (data->interface_type == MUSB_INTERFACE_UTMI) {
		/* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
		l &= ~ULPI_12PIN;       /* Disable ULPI */
		l |= UTMI_8BIT;         /* Enable UTMI  */
	} else {
		l |= ULPI_12PIN;
	}

	musb_writel(musb->mregs, OTG_INTERFSEL, l);

	pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
			"sysstatus 0x%x, intrfsel 0x%x, simenable  0x%x\n",
			musb_readl(musb->mregs, OTG_REVISION),
			musb_readl(musb->mregs, OTG_SYSCONFIG),
			musb_readl(musb->mregs, OTG_SYSSTATUS),
			musb_readl(musb->mregs, OTG_INTERFSEL),
			musb_readl(musb->mregs, OTG_SIMENABLE));

	musb->nb.notifier_call = musb_otg_notifications;
	status = otg_register_notifier(musb->xceiv, &musb->nb);

	if (status)
		dev_dbg(musb->controller, "notification register failed\n");

	setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);

	return 0;

err1:
	return status;
}

static void omap2430_musb_enable(struct musb *musb)
{
	u8		devctl;
	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
	struct device *dev = musb->controller;
	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	struct omap_musb_board_data *data = pdata->board_data;

	switch (musb->xceiv->last_event) {

	case USB_EVENT_ID:
		otg_init(musb->xceiv);
		if (data->interface_type != MUSB_INTERFACE_UTMI)
			break;
		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
		/* start the session */
		devctl |= MUSB_DEVCTL_SESSION;
		musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
		while (musb_readb(musb->mregs, MUSB_DEVCTL) &
				MUSB_DEVCTL_BDEVICE) {
			cpu_relax();

			if (time_after(jiffies, timeout)) {
				dev_err(dev, "configured as A device timeout");
				break;
			}
		}
		break;

	case USB_EVENT_VBUS:
		otg_init(musb->xceiv);
		break;

	default:
		break;
	}
}

static void omap2430_musb_disable(struct musb *musb)
{
	if (musb->xceiv->last_event)
		otg_shutdown(musb->xceiv);
}

static int omap2430_musb_exit(struct musb *musb)
{
	del_timer_sync(&musb_idle_timer);

	omap2430_low_level_exit(musb);
	otg_put_transceiver(musb->xceiv);

	return 0;
}

static const struct musb_platform_ops omap2430_ops = {
	.init		= omap2430_musb_init,
	.exit		= omap2430_musb_exit,

	.set_mode	= omap2430_musb_set_mode,
	.try_idle	= omap2430_musb_try_idle,

	.set_vbus	= omap2430_musb_set_vbus,

	.enable		= omap2430_musb_enable,
	.disable	= omap2430_musb_disable,
};

static u64 omap2430_dmamask = DMA_BIT_MASK(32);

static int __init omap2430_probe(struct platform_device *pdev)
{
	struct musb_hdrc_platform_data	*pdata = pdev->dev.platform_data;
	struct platform_device		*musb;
	struct omap2430_glue		*glue;
	int				ret = -ENOMEM;

	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
	if (!glue) {
		dev_err(&pdev->dev, "failed to allocate glue context\n");
		goto err0;
	}

	musb = platform_device_alloc("musb-hdrc", -1);
	if (!musb) {
		dev_err(&pdev->dev, "failed to allocate musb device\n");
		goto err1;
	}

	musb->dev.parent		= &pdev->dev;
	musb->dev.dma_mask		= &omap2430_dmamask;
	musb->dev.coherent_dma_mask	= omap2430_dmamask;

	glue->dev			= &pdev->dev;
	glue->musb			= musb;

	pdata->platform_ops		= &omap2430_ops;

	platform_set_drvdata(pdev, glue);

	ret = platform_device_add_resources(musb, pdev->resource,
			pdev->num_resources);
	if (ret) {
		dev_err(&pdev->dev, "failed to add resources\n");
		goto err2;
	}

	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
	if (ret) {
		dev_err(&pdev->dev, "failed to add platform_data\n");
		goto err2;
	}

	ret = platform_device_add(musb);
	if (ret) {
		dev_err(&pdev->dev, "failed to register musb device\n");
		goto err2;
	}

	pm_runtime_enable(&pdev->dev);

	return 0;

err2:
	platform_device_put(musb);

err1:
	kfree(glue);

err0:
	return ret;
}

static int __exit omap2430_remove(struct platform_device *pdev)
{
	struct omap2430_glue		*glue = platform_get_drvdata(pdev);

	platform_device_del(glue->musb);
	platform_device_put(glue->musb);
	pm_runtime_put(&pdev->dev);
	kfree(glue);

	return 0;
}

#ifdef CONFIG_PM

static int omap2430_runtime_suspend(struct device *dev)
{
	struct omap2430_glue		*glue = dev_get_drvdata(dev);
	struct musb			*musb = glue_to_musb(glue);

	musb->context.otg_interfsel = musb_readl(musb->mregs,
						OTG_INTERFSEL);

	omap2430_low_level_exit(musb);
	otg_set_suspend(musb->xceiv, 1);

	return 0;
}

static int omap2430_runtime_resume(struct device *dev)
{
	struct omap2430_glue		*glue = dev_get_drvdata(dev);
	struct musb			*musb = glue_to_musb(glue);

	omap2430_low_level_init(musb);
	musb_writel(musb->mregs, OTG_INTERFSEL,
					musb->context.otg_interfsel);

	otg_set_suspend(musb->xceiv, 0);

	return 0;
}

static struct dev_pm_ops omap2430_pm_ops = {
	.runtime_suspend = omap2430_runtime_suspend,
	.runtime_resume = omap2430_runtime_resume,
};

#define DEV_PM_OPS	(&omap2430_pm_ops)
#else
#define DEV_PM_OPS	NULL
#endif

static struct platform_driver omap2430_driver = {
	.remove		= __exit_p(omap2430_remove),
	.driver		= {
		.name	= "musb-omap2430",
		.pm	= DEV_PM_OPS,
	},
};

MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
MODULE_LICENSE("GPL v2");

static int __init omap2430_init(void)
{
	return platform_driver_probe(&omap2430_driver, omap2430_probe);
}
subsys_initcall(omap2430_init);

static void __exit omap2430_exit(void)
{
	platform_driver_unregister(&omap2430_driver);
}
module_exit(omap2430_exit);
Commit	Line	Data
550a7375 FB	1	/*
	2	* Copyright (C) 2005-2007 by Texas Instruments
	3	* Some code has been taken from tusb6010.c
	4	* Copyrights for that are attributable to:
	5	* Copyright (C) 2006 Nokia Corporation
550a7375 FB	6	* Tony Lindgren <tony@atomide.com>
	7	*
	8	* This file is part of the Inventra Controller Driver for Linux.
	9	*
	10	* The Inventra Controller Driver for Linux is free software; you
	11	* can redistribute it and/or modify it under the terms of the GNU
	12	* General Public License version 2 as published by the Free Software
	13	* Foundation.
	14	*
	15	* The Inventra Controller Driver for Linux is distributed in
	16	* the hope that it will be useful, but WITHOUT ANY WARRANTY;
	17	* without even the implied warranty of MERCHANTABILITY or
	18	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
	19	* License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with The Inventra Controller Driver for Linux ; if not,
	23	* write to the Free Software Foundation, Inc., 59 Temple Place,
	24	* Suite 330, Boston, MA 02111-1307 USA
	25	*
	26	*/
	27	#include <linux/module.h>
	28	#include <linux/kernel.h>
	29	#include <linux/sched.h>
550a7375 FB	30	#include <linux/init.h>
550a7375 FB	31	#include <linux/list.h>
550a7375	32	#include <linux/io.h>
dc09886b FB	33	#include <linux/platform_device.h>
dc09886b FB	34	#include <linux/dma-mapping.h>
207b0e1f HH	35	#include <linux/pm_runtime.h>
207b0e1f HH	36	#include <linux/err.h>
550a7375	37
550a7375 FB	38	#include "musb_core.h"
	39	#include "omap2430.h"
	40
a3cee12a FB	41	struct omap2430_glue {
	42	struct device *dev;
	43	struct platform_device *musb;
	44	};
c20aebb9	45	#define glue_to_musb(g) platform_get_drvdata(g->musb)
a3cee12a	46
550a7375 FB	47	static struct timer_list musb_idle_timer;
	48
	49	static void musb_do_idle(unsigned long _musb)
	50	{
	51	struct musb musb = (void )_musb;
	52	unsigned long flags;
	53	u8 power;
	54	u8 devctl;
	55
550a7375 FB	56	spin_lock_irqsave(&musb->lock, flags);
550a7375 FB	57
84e250ff	58	switch (musb->xceiv->state) {
550a7375	59	case OTG_STATE_A_WAIT_BCON:
550a7375 FB	60
	61	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	62	if (devctl & MUSB_DEVCTL_BDEVICE) {
84e250ff	63	musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375 FB	64	MUSB_DEV_MODE(musb);
550a7375 FB	65	} else {
84e250ff	66	musb->xceiv->state = OTG_STATE_A_IDLE;
550a7375 FB	67	MUSB_HST_MODE(musb);
	68	}
	69	break;
550a7375 FB	70	case OTG_STATE_A_SUSPEND:
	71	/* finish RESUME signaling? */
	72	if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
	73	power = musb_readb(musb->mregs, MUSB_POWER);
	74	power &= ~MUSB_POWER_RESUME;
5c8a86e1	75	dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
550a7375 FB	76	musb_writeb(musb->mregs, MUSB_POWER, power);
	77	musb->is_active = 1;
	78	musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
	79	\| MUSB_PORT_STAT_RESUME);
	80	musb->port1_status \|= USB_PORT_STAT_C_SUSPEND << 16;
	81	usb_hcd_poll_rh_status(musb_to_hcd(musb));
	82	/* NOTE: it might really be A_WAIT_BCON ... */
84e250ff	83	musb->xceiv->state = OTG_STATE_A_HOST;
550a7375 FB	84	}
550a7375 FB	85	break;
550a7375 FB	86	case OTG_STATE_A_HOST:
	87	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	88	if (devctl & MUSB_DEVCTL_BDEVICE)
84e250ff	89	musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375	90	else
84e250ff	91	musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
550a7375 FB	92	default:
	93	break;
	94	}
	95	spin_unlock_irqrestore(&musb->lock, flags);
	96	}
	97
	98
743411b3	99	static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
550a7375 FB	100	{
	101	unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
	102	static unsigned long last_timer;
	103
	104	if (timeout == 0)
	105	timeout = default_timeout;
	106
	107	/* Never idle if active, or when VBUS timeout is not set as host */
	108	if (musb->is_active \|\| ((musb->a_wait_bcon == 0)
84e250ff	109	&& (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
5c8a86e1	110	dev_dbg(musb->controller, "%s active, deleting timer\n",
3df00453	111	otg_state_string(musb->xceiv->state));
550a7375 FB	112	del_timer(&musb_idle_timer);
	113	last_timer = jiffies;
	114	return;
	115	}
	116
	117	if (time_after(last_timer, timeout)) {
	118	if (!timer_pending(&musb_idle_timer))
	119	last_timer = timeout;
	120	else {
5c8a86e1	121	dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
550a7375 FB	122	return;
	123	}
	124	}
	125	last_timer = timeout;
	126
5c8a86e1	127	dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
3df00453	128	otg_state_string(musb->xceiv->state),
550a7375 FB	129	(unsigned long)jiffies_to_msecs(timeout - jiffies));
	130	mod_timer(&musb_idle_timer, timeout);
	131	}
	132
743411b3	133	static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
550a7375 FB	134	{
550a7375 FB	135	u8 devctl;
594632ef HH	136	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
594632ef HH	137	int ret = 1;
550a7375 FB	138	/* HDRC controls CPEN, but beware current surges during device
	139	* connect. They can trigger transient overcurrent conditions
	140	* that must be ignored.
	141	*/
	142
	143	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	144
	145	if (is_on) {
594632ef HH	146	if (musb->xceiv->state == OTG_STATE_A_IDLE) {
	147	/* start the session */
	148	devctl \|= MUSB_DEVCTL_SESSION;
	149	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	150	/*
	151	* Wait for the musb to set as A device to enable the
	152	* VBUS
	153	*/
	154	while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
	155
	156	cpu_relax();
	157
	158	if (time_after(jiffies, timeout)) {
	159	dev_err(musb->controller,
	160	"configured as A device timeout");
	161	ret = -EINVAL;
	162	break;
	163	}
	164	}
	165
	166	if (ret && musb->xceiv->set_vbus)
	167	otg_set_vbus(musb->xceiv, 1);
	168	} else {
	169	musb->is_active = 1;
	170	musb->xceiv->default_a = 1;
	171	musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
	172	devctl \|= MUSB_DEVCTL_SESSION;
	173	MUSB_HST_MODE(musb);
	174	}
550a7375 FB	175	} else {
	176	musb->is_active = 0;
	177
	178	/* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
	179	* jumping right to B_IDLE...
	180	*/
	181
84e250ff DB	182	musb->xceiv->default_a = 0;
84e250ff DB	183	musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375 FB	184	devctl &= ~MUSB_DEVCTL_SESSION;
	185
	186	MUSB_DEV_MODE(musb);
	187	}
	188	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	189
5c8a86e1	190	dev_dbg(musb->controller, "VBUS %s, devctl %02x "
550a7375	191	/* otg %3x conf %08x prcm %08x */ "\n",
3df00453	192	otg_state_string(musb->xceiv->state),
550a7375 FB	193	musb_readb(musb->mregs, MUSB_DEVCTL));
550a7375 FB	194	}
550a7375	195
743411b3	196	static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
550a7375 FB	197	{
	198	u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	199
	200	devctl \|= MUSB_DEVCTL_SESSION;
	201	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	202
96a274d1	203	return 0;
550a7375 FB	204	}
550a7375 FB	205
c20aebb9 FB	206	static inline void omap2430_low_level_exit(struct musb *musb)
	207	{
	208	u32 l;
	209
	210	/* in any role */
	211	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
	212	l \|= ENABLEFORCE; /* enable MSTANDBY */
	213	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
c20aebb9 FB	214	}
	215
	216	static inline void omap2430_low_level_init(struct musb *musb)
	217	{
	218	u32 l;
	219
c20aebb9 FB	220	l = musb_readl(musb->mregs, OTG_FORCESTDBY);
	221	l &= ~ENABLEFORCE; /* disable MSTANDBY */
	222	musb_writel(musb->mregs, OTG_FORCESTDBY, l);
	223	}
	224
594632ef HH	225	/* blocking notifier support */
	226	static int musb_otg_notifications(struct notifier_block *nb,
	227	unsigned long event, void *unused)
	228	{
	229	struct musb *musb = container_of(nb, struct musb, nb);
712d8efa VP	230
	231	musb->xceiv_event = event;
	232	schedule_work(&musb->otg_notifier_work);
	233
	234	return 0;
	235	}
	236
	237	static void musb_otg_notifier_work(struct work_struct *data_notifier_work)
	238	{
	239	struct musb *musb = container_of(data_notifier_work, struct musb, otg_notifier_work);
594632ef HH	240	struct device *dev = musb->controller;
	241	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	242	struct omap_musb_board_data *data = pdata->board_data;
	243
712d8efa	244	switch (musb->xceiv_event) {
594632ef	245	case USB_EVENT_ID:
5c8a86e1	246	dev_dbg(musb->controller, "ID GND\n");
594632ef	247
b3314d9a	248	if (!is_otg_enabled(musb) \|\| musb->gadget_driver) {
7acc6197	249	pm_runtime_get_sync(musb->controller);
594632ef	250	otg_init(musb->xceiv);
70045c57	251	omap2430_musb_set_vbus(musb, 1);
594632ef HH	252	}
	253	break;
	254
	255	case USB_EVENT_VBUS:
5c8a86e1	256	dev_dbg(musb->controller, "VBUS Connect\n");
594632ef	257
7acc6197 HH	258	if (musb->gadget_driver)
7acc6197 HH	259	pm_runtime_get_sync(musb->controller);
594632ef HH	260	otg_init(musb->xceiv);
	261	break;
	262
	263	case USB_EVENT_NONE:
5c8a86e1	264	dev_dbg(musb->controller, "VBUS Disconnect\n");
594632ef	265
383cf4e8	266	if (is_otg_enabled(musb) \|\| is_peripheral_enabled(musb))
62285963	267	if (musb->gadget_driver) {
7acc6197 HH	268	pm_runtime_mark_last_busy(musb->controller);
	269	pm_runtime_put_autosuspend(musb->controller);
	270	}
	271
594632ef HH	272	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	273	if (musb->xceiv->set_vbus)
	274	otg_set_vbus(musb->xceiv, 0);
	275	}
	276	otg_shutdown(musb->xceiv);
	277	break;
	278	default:
5c8a86e1	279	dev_dbg(musb->controller, "ID float\n");
594632ef	280	}
594632ef HH	281	}
594632ef HH	282
743411b3	283	static int omap2430_musb_init(struct musb *musb)
550a7375	284	{
594632ef	285	u32 l, status = 0;
ea65df57 HK	286	struct device *dev = musb->controller;
	287	struct musb_hdrc_platform_data *plat = dev->platform_data;
	288	struct omap_musb_board_data *data = plat->board_data;
550a7375	289
84e250ff DB	290	/* We require some kind of external transceiver, hooked
	291	* up through ULPI. TWL4030-family PMICs include one,
	292	* which needs a driver, drivers aren't always needed.
	293	*/
	294	musb->xceiv = otg_get_transceiver();
	295	if (!musb->xceiv) {
	296	pr_err("HS USB OTG: no transceiver configured\n");
	297	return -ENODEV;
	298	}
	299
712d8efa VP	300	INIT_WORK(&musb->otg_notifier_work, musb_otg_notifier_work);
712d8efa VP	301
7acc6197 HH	302	status = pm_runtime_get_sync(dev);
	303	if (status < 0) {
	304	dev_err(dev, "pm_runtime_get_sync FAILED");
	305	goto err1;
	306	}
550a7375	307
8573e6a6	308	l = musb_readl(musb->mregs, OTG_INTERFSEL);
de2e1b0c MM	309
	310	if (data->interface_type == MUSB_INTERFACE_UTMI) {
	311	/* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
	312	l &= ~ULPI_12PIN; /* Disable ULPI */
	313	l \|= UTMI_8BIT; /* Enable UTMI */
	314	} else {
	315	l \|= ULPI_12PIN;
	316	}
	317
8573e6a6	318	musb_writel(musb->mregs, OTG_INTERFSEL, l);
550a7375 FB	319
	320	pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
	321	"sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
8573e6a6 FB	322	musb_readl(musb->mregs, OTG_REVISION),
	323	musb_readl(musb->mregs, OTG_SYSCONFIG),
	324	musb_readl(musb->mregs, OTG_SYSSTATUS),
	325	musb_readl(musb->mregs, OTG_INTERFSEL),
	326	musb_readl(musb->mregs, OTG_SIMENABLE));
550a7375	327
594632ef HH	328	musb->nb.notifier_call = musb_otg_notifications;
	329	status = otg_register_notifier(musb->xceiv, &musb->nb);
	330
	331	if (status)
5c8a86e1	332	dev_dbg(musb->controller, "notification register failed\n");
594632ef	333
550a7375 FB	334	setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
	335
	336	return 0;
7acc6197 HH	337
7acc6197 HH	338	err1:
7acc6197	339	return status;
550a7375 FB	340	}
550a7375 FB	341
002eda13 HH	342	static void omap2430_musb_enable(struct musb *musb)
	343	{
	344	u8 devctl;
	345	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
	346	struct device *dev = musb->controller;
	347	struct musb_hdrc_platform_data *pdata = dev->platform_data;
	348	struct omap_musb_board_data *data = pdata->board_data;
	349
	350	switch (musb->xceiv->last_event) {
	351
	352	case USB_EVENT_ID:
	353	otg_init(musb->xceiv);
08dec56e FC	354	if (data->interface_type != MUSB_INTERFACE_UTMI)
	355	break;
	356	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	357	/* start the session */
	358	devctl \|= MUSB_DEVCTL_SESSION;
	359	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
	360	while (musb_readb(musb->mregs, MUSB_DEVCTL) &
	361	MUSB_DEVCTL_BDEVICE) {
	362	cpu_relax();
	363
	364	if (time_after(jiffies, timeout)) {
	365	dev_err(dev, "configured as A device timeout");
	366	break;
002eda13 HH	367	}
	368	}
	369	break;
	370
	371	case USB_EVENT_VBUS:
	372	otg_init(musb->xceiv);
	373	break;
	374
	375	default:
	376	break;
	377	}
	378	}
	379
	380	static void omap2430_musb_disable(struct musb *musb)
	381	{
	382	if (musb->xceiv->last_event)
	383	otg_shutdown(musb->xceiv);
550a7375 FB	384	}
550a7375 FB	385
743411b3	386	static int omap2430_musb_exit(struct musb *musb)
550a7375	387	{
19b9a83e	388	del_timer_sync(&musb_idle_timer);
550a7375	389
c20aebb9	390	omap2430_low_level_exit(musb);
f4053874	391	otg_put_transceiver(musb->xceiv);
c20aebb9	392
550a7375 FB	393	return 0;
550a7375 FB	394	}
743411b3	395
f7ec9437	396	static const struct musb_platform_ops omap2430_ops = {
743411b3 FB	397	.init = omap2430_musb_init,
	398	.exit = omap2430_musb_exit,
	399
743411b3 FB	400	.set_mode = omap2430_musb_set_mode,
	401	.try_idle = omap2430_musb_try_idle,
	402
	403	.set_vbus = omap2430_musb_set_vbus,
002eda13 HH	404
	405	.enable = omap2430_musb_enable,
	406	.disable = omap2430_musb_disable,
743411b3	407	};
dc09886b FB	408
	409	static u64 omap2430_dmamask = DMA_BIT_MASK(32);
	410
	411	static int __init omap2430_probe(struct platform_device *pdev)
	412	{
	413	struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
	414	struct platform_device *musb;
a3cee12a	415	struct omap2430_glue *glue;
dc09886b FB	416	int ret = -ENOMEM;
dc09886b FB	417
a3cee12a FB	418	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
	419	if (!glue) {
	420	dev_err(&pdev->dev, "failed to allocate glue context\n");
	421	goto err0;
	422	}
	423
dc09886b FB	424	musb = platform_device_alloc("musb-hdrc", -1);
	425	if (!musb) {
	426	dev_err(&pdev->dev, "failed to allocate musb device\n");
a3cee12a	427	goto err1;
dc09886b FB	428	}
	429
	430	musb->dev.parent = &pdev->dev;
	431	musb->dev.dma_mask = &omap2430_dmamask;
	432	musb->dev.coherent_dma_mask = omap2430_dmamask;
	433
a3cee12a FB	434	glue->dev = &pdev->dev;
	435	glue->musb = musb;
	436
f7ec9437 FB	437	pdata->platform_ops = &omap2430_ops;
f7ec9437 FB	438
a3cee12a	439	platform_set_drvdata(pdev, glue);
dc09886b FB	440
	441	ret = platform_device_add_resources(musb, pdev->resource,
	442	pdev->num_resources);
	443	if (ret) {
	444	dev_err(&pdev->dev, "failed to add resources\n");
207b0e1f	445	goto err2;
dc09886b FB	446	}
	447
	448	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
	449	if (ret) {
	450	dev_err(&pdev->dev, "failed to add platform_data\n");
207b0e1f	451	goto err2;
dc09886b FB	452	}
	453
	454	ret = platform_device_add(musb);
	455	if (ret) {
	456	dev_err(&pdev->dev, "failed to register musb device\n");
207b0e1f	457	goto err2;
dc09886b FB	458	}
dc09886b FB	459
207b0e1f	460	pm_runtime_enable(&pdev->dev);
03491761	461
207b0e1f	462	return 0;
03491761	463
a3cee12a	464	err2:
dc09886b FB	465	platform_device_put(musb);
dc09886b FB	466
a3cee12a FB	467	err1:
	468	kfree(glue);
	469
dc09886b FB	470	err0:
	471	return ret;
	472	}
	473
	474	static int __exit omap2430_remove(struct platform_device *pdev)
	475	{
a3cee12a	476	struct omap2430_glue *glue = platform_get_drvdata(pdev);
dc09886b	477
a3cee12a FB	478	platform_device_del(glue->musb);
a3cee12a FB	479	platform_device_put(glue->musb);
207b0e1f	480	pm_runtime_put(&pdev->dev);
a3cee12a	481	kfree(glue);
dc09886b FB	482
	483	return 0;
	484	}
	485
c20aebb9	486	#ifdef CONFIG_PM
c20aebb9	487
7acc6197	488	static int omap2430_runtime_suspend(struct device *dev)
c20aebb9 FB	489	{
	490	struct omap2430_glue *glue = dev_get_drvdata(dev);
	491	struct musb *musb = glue_to_musb(glue);
	492
e25bec16 HH	493	musb->context.otg_interfsel = musb_readl(musb->mregs,
	494	OTG_INTERFSEL);
	495
c20aebb9 FB	496	omap2430_low_level_exit(musb);
c20aebb9 FB	497	otg_set_suspend(musb->xceiv, 1);
c20aebb9 FB	498
	499	return 0;
	500	}
	501
7acc6197	502	static int omap2430_runtime_resume(struct device *dev)
c20aebb9 FB	503	{
	504	struct omap2430_glue *glue = dev_get_drvdata(dev);
	505	struct musb *musb = glue_to_musb(glue);
c20aebb9 FB	506
c20aebb9 FB	507	omap2430_low_level_init(musb);
e25bec16 HH	508	musb_writel(musb->mregs, OTG_INTERFSEL,
	509	musb->context.otg_interfsel);
	510
c20aebb9 FB	511	otg_set_suspend(musb->xceiv, 0);
	512
	513	return 0;
	514	}
	515
	516	static struct dev_pm_ops omap2430_pm_ops = {
7acc6197 HH	517	.runtime_suspend = omap2430_runtime_suspend,
7acc6197 HH	518	.runtime_resume = omap2430_runtime_resume,
c20aebb9 FB	519	};
	520
	521	#define DEV_PM_OPS (&omap2430_pm_ops)
	522	#else
	523	#define DEV_PM_OPS NULL
	524	#endif
	525
dc09886b FB	526	static struct platform_driver omap2430_driver = {
	527	.remove = __exit_p(omap2430_remove),
	528	.driver = {
	529	.name = "musb-omap2430",
c20aebb9	530	.pm = DEV_PM_OPS,
dc09886b FB	531	},
	532	};
	533
	534	MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
	535	MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
	536	MODULE_LICENSE("GPL v2");
	537
	538	static int __init omap2430_init(void)
	539	{
	540	return platform_driver_probe(&omap2430_driver, omap2430_probe);
	541	}
	542	subsys_initcall(omap2430_init);
	543
	544	static void __exit omap2430_exit(void)
	545	{
	546	platform_driver_unregister(&omap2430_driver);
	547	}
	548	module_exit(omap2430_exit);